Machine for stretching hides and skins



Jan. 22 1924.

D. MERCIER MACHINE FOR STRETCHING HIDES AND SKINS Filed Jan. 27. 1921 v v w 5 Z .5 F2910 Y 1 17' Q l MSI'Cl eF INVENTOR By JAM/ 1 Alto nly.

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patented Jan. 22, 1924.

UNITED STATES DANIEL MEBCIER, OEANNONAY, FRANCE.

MACHINE FOR STBETCHING- HIDES AND SKINS.

Application filed January 27, 1921. Serial No. 440,304.

To all whom it may concern:

Be it known that I, DANIEL Muncmn, citizen of the Republic of France, residing at iinnona-y, Ardeche, in the Republic of France, have invented new and useful Improvements in Machines for Stretching I lides and Skins, of which the following is mg to the special operation to be effected.

Other machines are known which comprise cylinders eccentric on their axes, said cylinders having a rather slow rotative movement and being provided with inclined sharp edged blades and radial blunt blades.

In other constructions, the blades are pro vided with notches so arranged that they are staggered in the longitudinal direction of the blades.

This invention consists in an improved construction and arrangement of blades which has distinct advantages over the constructions heretofore known.

According to the present invention the blades have a regularly curved edge upon which the hide is pressed in order to be stretched and widened. For this purpose the blades have a straight fiat part by means of which the blades are secured in slots provided on the cylinder and a corrugated part, which forms the working portion of the blade.

In the accompanying drawing, given by way of example:

Fig. l is a developed view of a cylinder provided with blades of the aforesaid type, said cylinder being more particularly adapted for use in a stretching machine for treating the marginal portions of the skins.

Fig. 2 shows the same cylinder in side view.

Fig. 3 is a front view, sectional elevation and plane view of a blade in an enlarged scale.

Figs. 4, 5, 6 are views similar to Figs. 1,2, 3 in case of a stretching and scraping machine.

Figs. 7, 8, 9, 10 are developed parts of a cylinder provided with blades of a modified shape and in a modified arrangement.

The improved blades 1 are provided with straight flat portions 1 (Fig. 3) which are engaged in slots provided in the cylinder 2; said blades are preferably arranged in a radial direction and the general direction of each blade is preferably parallel to the axis of said cylinder.

The outer portion 3 of the blades is corrugated, each corrugation forming a kind of a V-shaped portion or chevron adaptedto work on the hides.

It is to be noted that the invention is not limited to the constructive details of the embodiment shown and described.

For instance, the outer portion of each blade may have the shape of a broken or sinuous line with acute or obtuse angles instead of a corrugated line with rounded angles. By way of example, blades of these kinds are shown in Figs. 7, 8, 9, 10. The parts of the corrugationswhich are foremost according to the direction of rotation of the drum may have a square edge while the other portions of the edge are dull or the whole edge can be dull. The corrugations of the blades may be staggered from one blade to the next one as shown in Figs. 7, 8, 9, 10. Some blades may also have a radial height greater than that of other blades. The outer contour of each blade as shown in elevation may be shaped as described or have any other desired shape.

Having now described my invention, what I claim as new and desire to secure by Let ters Patent is:

1. A working drum for stretching hides and skins comprising a cylinder and blades on said cylinder each having a straight body portion and a corrugated working part.

2. A working drum for stretching hides and skins comprising a cylinder having slots in its periphery and blades comprising a fiat straight portion, a part of which is adapted to engage said slots and an outer corrugated working part.

3. A working drum for stretching hides and skins comprising a cylinder having slots in its periphery and blades comprising a fiat straight portion, a part of which is adapted to engage said slots and an outer corrugated working part, said blades being arranged in a radial direction and havin a general direction parallel to the axis 0 said cylinder.

DANIEL MERCIER. 

